
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author fe500728
 */
public class ListeMessage extends HttpServlet {

    String login = "";
    String Massage = "";

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        try {
            /* TODO output your page here
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet BlackCat</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet BlackCat at " + request.getContextPath () + "</h1>");
            out.println("</body>");
            out.println("</html>");
             */
            response.setContentType("text/xml");
            OutputStream os = response.getOutputStream();
            OutputStreamWriter osw = new OutputStreamWriter(os, "UTF-8");
            PrintWriter pw = new PrintWriter(osw);





        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //processRequest(request, response);
         String fPathMessage = request.getRealPath("index.jsp").replace("index.jsp", "message.xml");
        PrintWriter out = response.getWriter();
       
        out.print(getListUsers(fPathMessage));
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

    public String getListUsers(String fPathMessage) {
        String lstMessages = "";
        try {


            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(fPathMessage);
            doc.getDocumentElement().normalize();

            NodeList nodeLst = doc.getElementsByTagName("messages").item(0).getChildNodes();

            for (int s = 0; s < nodeLst.getLength(); s++) {

                Node fstNode = nodeLst.item(s);

                if (fstNode.getNodeType() == Node.ELEMENT_NODE) {

                    
                    lstMessages = lstMessages + fstNode.getTextContent() + "\n";



                }
            }
           
            return lstMessages;
        } catch (Exception e) {
            e.printStackTrace();
            return lstMessages;
        }

    }
}